Is blood that exceeds the usual duration of menstruation considered istihadah (non-menstrual vaginal bleeding) requiring wudu for each prayer, or hayd (menstruation) that prohibits prayer and purity?

As long as the total number of days of bleeding does not exceed fifteen days, then all of it is menstruation, and no attention should be paid to the previous custom because it changes. Every blood a woman sees during the period of possibility of menstruation is considered menses. Therefore, a woman must refrain from prayer and all that is forbidden to a menstruating woman until she sees purity by one of its two signs.